By William W. Abbott
Sierra Club v. Napa County Board of Supervisors (2012) 205 Cal.App.4th 162.
In 1991, the California Legislature amended the Subdivision Map Act to restrict the use of boundary line adjustments by limiting their use to four or fewer adjacent parcels. Government Code Section 66412(d). While intended to deal with the reconfiguration of large ranches without going through the subdivision process, the 1991 amendment made the process of making minor technical adjustments between contiguous parcels unnecessarily more cumbersome then what was really necessary. (Essentially, the use of a nail gun to put in a thumbtack.) Local governments and engineers developed different strategies for working around the amendments. One of those was processing multiple sequential adjustments.